1977 Chevrolet K30 Engine: 5.7L V8; Standard Rotation|Optional Non-Thermal Fan Clutch|w/ Std Duty Fan Clutch;. 1977 Chevrolet K30 Engine: 4.8L L6; Standard Rotation|Optional Non-Thermal Fan Clutch;. 1978 Chevrolet K30 Engine: 5.7L V8; Standard Rotation|Optional Non-Thermal Fan Clutch|w/ Std Duty Fan Clutch;.
